tmakin/tegra-linux-noble
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[PATCH] x86_64: Support memory hotadd without sparsemem

Browse Source 
Memory hotadd doesn't need SPARSEMEM, but can be handled by just preallocating
mem_maps. This only needs some untangling of ifdefs to enable the necessary
code even without SPARSEMEM.

Originally from Keith Mannthey, hacked by AK.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen
2006-04-07 19:49:15 +02:00
committed by Linus Torvalds
parent 805e8c03c9
commit 9d99aaa31f
6 changed files with 47 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/linux/memory_hotplug.h
+7 -7
View File
@@ -58,8 +58,6 @@ extern int add_one_highpage(struct page *page, int pfn, int bad_ppro);
/* need some defines for these for archs that don't support it */
extern void online_page(struct page *page);
/* VM interface that may be used by firmware interface */
extern int add_memory(u64 start, u64 size);
extern int remove_memory(u64 start, u64 size);
extern int online_pages(unsigned long, unsigned long);
/* reasonably generic interface to expand the physical pages in a zone */
@@ -92,11 +90,6 @@ static inline int mhp_notimplemented(const char *func)
return -ENOSYS;
}
static inline int __add_pages(struct zone *zone, unsigned long start_pfn,
unsigned long nr_pages)
{
return mhp_notimplemented(__FUNCTION__);
}
#endif /* ! CONFIG_MEMORY_HOTPLUG */
static inline int __remove_pages(struct zone *zone, unsigned long start_pfn,
unsigned long nr_pages)
@@ -105,4 +98,11 @@ static inline int __remove_pages(struct zone *zone, unsigned long start_pfn,
dump_stack();
return -ENOSYS;
}
#if defined(CONFIG_MEMORY_HOTPLUG) || defined(CONFIG_ACPI_HOTPLUG_MEMORY) \
|| defined(CONFIG_ACPI_HOTPLUG_MEMORY_MODULE)
extern int add_memory(u64 start, u64 size);
extern int remove_memory(u64 start, u64 size);
#endif
#endif /* __LINUX_MEMORY_HOTPLUG_H */